Improvement in baskets for tile-grinders



-erable part of its length.

gat-ent deities.

PETERO. RENIERS, 0F' PIT'ISBURG, PENNSYLVANIA.

Letters Patent No. 110,072, dated December 13, 1870; antedated December 10, 1870.

IMPROVEMENT IN BASKETS FO'R TILE-GRINDERS.

The Schedule referred to in these Letters Patent and making parl: of the same.

To all whom et may concern i Y ,Be it known that I, PETER C. Rnnlnns, of the city 'of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a-new and useful Improvement in Basket forA Grinding Tile; and I do hereby declare the following to be a full, clear, and eXact description thereof, reference being had tothe accompanying drawing making a part oi' this specification, in w-hich-.

v`Figure l is a perspective view, reduced, of the grinding-table;

` Figure 2 shows an ,elevation basket;

Figure 3 shows an elevation of the opposite side;

of one side of the j Figure 4 is a'detached plan view of the central rail,

which is arranged lengthwise of the basket, midway between its opposite sides; 'and Figure 5 is a section through x a', iig. 2.

Like letters of reference indicate like parts in each.

My inventiou'relates to an improvement in basketl and table for grinding the edges o f marble or other ystone tile, slabs, or plates, whereby a large number of such :tile or slabscan be ground at once, and with slight and easily made adjustments to any desired angle, andL to any desired size, the grinding automaticallyeeasiug at the propertime.

To enable others skilled in the art to make and use my improvement, I will* proceed to describe its construction and mode of operation.

' The revolving grinding-tableA is such as is already in use" for grinding tile. This I surround by a stationary circular frame, A'.

" 'Across the face of the table A and clear of it, I ar- -.ra'nge one, two, or more beams, B;

Attached to these beams B orto beams B and irame Aare the bearers B', which also extend across the face of the plate A, and so that the plate may revolve .clear of them. They are so adjusted with lreference Vv,to eachvv other that they shall be in proper position for bearers to the frame-work, presently to be described.

For a basket, I make, of any desired size and suitable material, a'frame, consisting of side rails C, end

pieces C', posts D, and bifurcated --fork or -bififreation of each leg D I'arrange a frictionlegs D', and in the roller, j', in such position that its lower face shall be l a little above the lower ends of its bifurcated leg. At or near the middle of each end of the basket is a post, E, slotted as at p, and in such slots -I fasten, 'by a threaded shank, c', and nut i', the ends of a carrying bar 1, which is slotted as at l', for purposes pres-v v ently to be explained.

` On one side of the basket, as shown in lig. 2, the

side rail C has a slot, q, extending through' a consid- Above'this rail, by means of rings aisliding upand down on the corner post, I attach aibar, a, having a slot, zr, through a greater part of its length.

The adjustment of this bar up and down is effected by set-screws a.

In makingr use of these devices for grinding tile, I employ a guide-rest, I), slotted as at b.

For grinding the edge of a diamond-shaped tile, F, or a tile of like form, I adjust thisguide-rest b by means of bolts and nuts c, the bolts passing throughthe slots q and al to such angle with the face of the grindingtable as is equal to the obtuse angle formed by two adjacent obtnse. ngled sides of the tile F.

One finished edge ot' the tile Il then rests on this guide b, while an adjacent4 edge is ground, the tile sliding down till it is brought to the form desired.

To grind a square tile, Gr, it is only necessary to adjust the guide-rest vertically, `as at b2, by bolt and nut as bei'or v A like guide may be arranged on the opposite side 'of each tile, it` found necessary, but if the basket is set on the grinding-table A in such position that the direction ot its revolution shall tend to press the tile against the guide, a single guidewill commonly suftice. A

On the opposite side of the basket, (see iig. have shown the lower lailslotted, as at y, and other slotted bars f g, similar in construction to the bar b already described, and like it'adjustable up and down on the corner 4posts D by means of rings f2 g2 and setserews f3 g3. .lhe purpose of these will shortly be explained.

Itwill be observed that the tile'F and G are setinside tbe bar b, fig. 2.

In order to hold it steadily in place against the bar b while being ground, Iv employ a device more fully shown in gs. 4 and 5.

This device consists of a block, my, bifurcated ateaeh end, as at n, and adjustably attached to the central slotted barl by means of a threaded shank, o, projecting through the slot l', and held in place by a nut, o.

The under side of the block fm is boxed through or recessed, as at nl, in order lo receive a spiral spring, n2, the ends of which bear against one end or head ot' a plunger, s, the other or outer end s' bearing galnst the face or side of the tile G and holding it witlrsut'- cient firmness in place against the bar a.

To relieve this pressure in changing tile oradjusting them, I use a lever, n, which is pivoted inthe bifurcation n. Its lower end is. also bifurcated, and the bifurcations n bear against a cross-piu in the plunger s. Then, by shifting the handle n, the pressure is removed from the tile at pleasure.

' I use one arrangement or set of such devices with each tile to be ground, and, if so desired, provide a sutiicicnt n umber to use the basket to its full capacity in grinding; but it is not necessary that eac-h block m carry a set of such devices in each en d, nor that' they be arranged centrally in the basket.

It is obvious that the arrangement of the several parts described may be somewhat varied without any material change iu the construction or mode of operation.

To insure the grinding of the tile to any desired size, I use aclamp or clip with an adjustable gauge, the construction of which is more fully shown in figs. 2 and 5.

This clip d is of U-shape, and passesover the upper edge of the tile to be ground, and is secured as far down on the tile as it may be desired to attach it, by means of a set-screw, d.

In a slot in one. side of the clip I insert the shank c of the gauge e, so that, by a set-screw, fm, the gauge c may be adjusted u p or down in the clip.

The workman, before putting the tile into the basket,

lays olf on the face of thetile a pattern of vthe tile to be madebut of a somewhat reduced size.l ference between the size of the pattern and the size The difof .the tile then beingmkn'own, the operator adjustsv v'his vgauge accordingly, and attaches the clip to the tile, so that the gauge shall come to the line of the pattern. 4 v

. The tile is then placed in the basket, the grinding proceeds, until the edge of: the gauge e comes down' ontb the 'upper edge of the bar a, when, of course, the tile can gojdown nro-further, and the, grinding ceases. In this way I secure `a straightledg'e, ground down to the line desired, and no further. -I make lthe clip d of east-iron, of considerable weight, so that its'grav- Aity shall cause the-tile to press the harder onthe face of,` the table, and thereby facilitate thev grinding.

:The devices shown on. the'v opposite iside of the basket (tig.'3) are for grinding tile of 'morel than four sides, andthey consist of bars f g, having slots f1 g1,` v and-are attached tothe posts -D by rings f2v g, as al.

ready described.

I bang, by means of inwardly-projecting flange. pieces u., a4 vertical plate,lf*, andfasten such plate thereto'hy'bolts passed through the inclined slots u* and through the slot in the bar.

At each endof the plate Vj4 I attach rests-a2 u?, which arefso inclined that the edges of the tile H to be ground will rest thereon.

One of these rests, u, may be rigidly attached to the'pl ate f4, and the other, u, formed of angle iron, and one iange of it may be slotted and adjustable, so that the guide rests u2 and 'a3 may beset nearer to or' further from each other, and at any desired angle .to each other. Y

A bar, t, havinga slot, t, at' eachend, extends across from one rest, u2, to tl1e'otheru3',and'is adjust# ably attached to the rests Vby means ofscrews c.

The tile H, one or more, are then dropped into the box thus made, with their edges on, andcorners projecting below, and are held in place by a set-screw, t2, 1

with or without an interposed pressure-block bearing Vagainst them.

' rlhe set-screws f3 which fasten the bar f are loos;

ened, so that the bar may slide-up and down.

` On each post D a collar, tw, is adjust-cd by means of a set-screw, so that when the projecting corner of the tile hasbeen .sufficiently ground down, the ring f2 of the bar f will rest on the collar w, and stop the fall of the tile onto the table, and prevent further grinding.

rlhe basketl described is set inv position with the rollers fr resting on the bearers B', and while the grinding is in progress no other care is necessary than to roll the basket along occasionally on the bearers B', so as to prevent the formation of grooves or ruts in the face ot the table.` With an ordinary table and a basket of proper size to operate thereon, from ten to twenty tile can be ground at o nce, to anydesired form, and perfectly true; 'and when the desired form is reached, if the gauges are properly set, the grinding will cease, though the table may continue to revolve.

\Vhat I claim, in the construction of tile-grinding baskets or frames, and desire to secure by Letters Patent, is-

1. Incombination with a revolving table, A, the bearers B B', arranged so that the basket may rest thereon, clear of thetable, but so that the tile in the lbasket may come in contact with the face of the table, substantially as described.

2. One`or more4 slotted bars a, adjustable np and down on the posts D, substantially as described.

3. The-slotted guide-rest b, in combination with the slotted bar u, and side rail O, and so arranged asto be capable`ot' a vertical or oblique adjustment, as shown in iig. 1.

4. The clip d, carrying in one sidethe' adjustable gauge'e, when used in connection with the bar c of a tile-grinding basket, substantially asset forth.'

5. rlhe slotted bar f, working loosely on its'posts' D,fas a carrier for a tile-frame, in combination with collars w,.so set as to stop the downward motion of the tile, and arrestl the grinding action at the proper oint. A 6. The tile-frame',consisting of plate f, from which flanges u project over the bar f, inclined rests u and u, and an outer bar, t, all ara nged substantially as 7. |lhe central slotted rail l, vertically adjustable in the end posts'E, .as va carrier for the devices which engage the tile and hold them in vertical position while v being ground. y

8. A. plunger', s, forced outward bya spiral spring, n2, and released from its hold on the 'tile by a lever, 'n3all arranged in an adjustable block, m, substantially as described.

ln testimony whereof, I, the said PETER G. ItnX-d` '"IEIs, have hereunto set my band.

, Patna c.l namens.

Vitnesses:

JQHN GLENN,

f Tues. B. Kann. 

